Comparison

Fast vs Body Rhythm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fast

Features
Read full description

Feel Better. Stay on Track. Your Fasting Journey, Made Simple. Build healthy habits and stay in tune with your body—without the clutter or complexity. This beautifully simple app helps you track intermittent fasting in a calm, intuitive way that fits effortlessly into your daily routine. Why You’ll Love It: • No accounts, no login, no tracking. Your data, your device. • Gentle, Simple Tracking: Start and stop fasts with just a tap. No distractions, just a clear view of your progress. • Apple Watch Ready: Track your fasts directly from your wrist—even without your phone nearby. • At-a-Glance Insights: Stay mindful of your fasts with elegant widgets on your iPhone and Apple Watch. • Private by Design: Your data is stored securely in your personal iCloud account. Nothing ever leaves your devices. Whether you’re fasting for wellness, focus, or energy, this app is your quiet companion on the journey.

About

Body Rhythm

Features
Read full description

Your workout, your rhythm. Rhythm is the ultimate interval timer designed for your Apple Watch and iPhone. Whether you're pushing through a grueling HIIT session, practicing mindfulness, or staying on top of your daily pelvic floor exercises, Rhythm adapts to your lifestyle. Key Features: Fully Customizable Intervals: Set active and rest times that match your goals. Versatile Activity Support: Perfect for HIIT, Tabata, Boxing, Yoga, and specialized routines like Kegel exercises and Meditation. Smart Scheduling: Organize your day with recurring routines and activities. Seamless Apple Watch Integration: Start and control your sessions right from your wrist. Elegant & Focused UI: A premium, distraction-free design with Light and Dark mode support. Progress Tracking: Stay motivated by viewing your activity history at a glance. Take control of your routines and find your rhythm today. Rhythm Pro: A one-time in-app purchase unlocks the creation of new schedules and removes ads. Activities, timers, history, widgets, Apple Watch, and existing schedules remain available without Pro.

Screenshots

Fast4 screens
Body Rhythm4 screens

Verdict

The call

The clearest difference is in-app purchases: Fast at none against Body Rhythm's 1. Fast also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Body Rhythm sells 1 one-off in-app purchase. Fast asks for nothing beyond the download.

UpkeepUpdate frequency

Fast ships an update every 2 weeks, Body Rhythm every 9 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 4 level
Fast versus Body Rhythm: the parameters behind the verdict, then further details
ParameterFastBody Rhythm
PriceFreeFree
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS26.0 — better26.2
Further details — not scored
Size35 MB15 MB
Age rating4+4+
DeveloperCodeHive阳 张

In-app purchases

None

Fast

No in-app purchases

1 purchases

Body Rhythm

One-time1
  • Rhythm Pro$2.99

Questions

Is Fast free?
Fast is free to download, with no in-app purchases.
Is Body Rhythm free?
Body Rhythm is free to download, with in-app purchases available.
Do Fast or Body Rhythm have ads?
Body Rhythm shows ads; Fast does not.
Which is updated more often, Fast or Body Rhythm?
Fast ships an update every 2 weeks, and Body Rhythm every 9 days. Most recently, Fast was updated on October 30, 2026 and Body Rhythm on November 9, 2026.

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